Support png file extension

BOOK.mkd

@@ -202,3 +202,5 @@
 * Oktober: [Charles Stross "Du bist tot"](https://www.buchhandel.de/buch/9783453526877)
 * November: [Daniel Suarez "Daemon: Die Welt ist nur ein Spiel"](https://www.buchhandel.de/buch/9783499256431)
 * Dezember: [William Gibson "Quellcode"](https://www.buchhandel.de/buch/9783453526808)
+
+## 2009

COMIC.mkd

@@ -89,3 +89,5 @@
 * Oktober: [Christophe Arleston "Morea"](https://www.buchhandel.de/buch/9783939823902)
 * November: [Neil Gaiman "American Gods"](https://www.buchhandel.de/buch/9783962196004)
 * Dezember: [Christophe Bec "Olympus Mons"](https://www.buchhandel.de/buch/9783962190200)
+
+## 2017

src/bdm.go

@@ -12,33 +12,47 @@ import (
 )
 
 type Item struct {
-	ISBN     string
+	ISBN          string
-	Author   string
+	FileExtension string
-	Title    string
+	Author        string
-	Filename string
+	Title         string
-	Date     string
+	Filename      string
+	Date          string
 }
 
-func (i Item) ImageURL() string {
+func (i Item) ImageURL(extension string) string {
 	return "https://medien.umbreitkatalog.de/bildzentrale_original/" +
 		i.ISBN[0:3] + "/" +
 		i.ISBN[3:6] + "/" +
 		i.ISBN[6:9] + "/" +
 		i.ISBN[9:13] +
-		".jpg"
+		"." + extension
 }
 
-func (i Item) targetFilename() string {
+func (i Item) targetFilename(extension string) string {
-	return "covers/" + i.ISBN + ".jpg"
+	return "covers/" + i.ISBN + "." + extension
 }
 
 func (i Item) downloadCover() error {
-	resp, err := http.Get(i.ImageURL())
+	extension := "jpg"
+
+	fmt.Printf("Downloading %v ...\n", i.ImageURL(extension))
+	resp, err := http.Get(i.ImageURL(extension))
 
 	if err != nil {
 		return err
 	}
 
+	// TODO: refactor later ...
+	if resp.StatusCode == 404 {
+		extension = "png"
+		fmt.Printf("Downloading %v ...\n", i.ImageURL(extension))
+		resp, err = http.Get(i.ImageURL(extension))
+		if err != nil {
+			return err
+		}
+	}
+
 	defer func(Body io.ReadCloser) {
 		err := Body.Close()
 		if err != nil {
@@ -50,7 +64,7 @@ func (i Item) downloadCover() error {
 		return fmt.Errorf("HTTP status code is %d", resp.StatusCode)
 	}
 
-	out, err := os.Create(i.targetFilename())
+	out, err := os.Create(i.targetFilename(extension))
 	if err != nil {
 		return err
 	}
@@ -113,12 +127,18 @@ func getItems(filename string) []Item {
 		if len(matches) == 4 {
 			currentMonth++
 
+			extension, err := getFileExtension(matches[3])
+			if err != nil {
+				log.Printf("%v", err)
+			}
+
 			yearBucket = append(yearBucket, Item{
-				Author:   strings.Trim(matches[1], " "),
+				ISBN:          matches[3],
-				Title:    strings.Trim(matches[2], " "),
+				FileExtension: extension,
-				ISBN:     matches[3],
+				Author:        strings.Trim(matches[1], " "),
-				Date:     fmt.Sprintf("01-%02d-%s", currentMonth, currentYear),
+				Title:         strings.Trim(matches[2], " "),
-				Filename: filename,
+				Filename:      filename,
+				Date:          fmt.Sprintf("01-%02d-%s", currentMonth, currentYear),
 			})
 		}
 	}
@@ -131,6 +151,23 @@ func getItems(filename string) []Item {
 	return items
 }
 
+func getFileExtension(isbn string) (string, error) {
+	// List all files in covers directory
+	// TODO: Cache this line
+	files, err := os.ReadDir("covers/")
+	if err != nil {
+		log.Fatal("Can not read the covers directory")
+		return "", err
+	}
+	for _, file := range files {
+		if strings.HasPrefix(file.Name(), isbn) {
+			return strings.Split(file.Name(), ".")[1], nil
+		}
+	}
+
+	return "", fmt.Errorf("File not found for ISBN: %v", isbn)
+}
+
 func getTemplate(sourceFile string, templateFilename string, w http.ResponseWriter) {
 	// Get all items from the git repo
 	items := getItems(sourceFile)
@@ -167,12 +204,11 @@ func main() {
 		items := getItems(filename)
 
 		for _, item := range items {
-			fmt.Printf("Downloading %v ...\n", item.ImageURL())
 			err := item.downloadCover()
 
 			if err != nil {
 				fmt.Printf("%v", err)
-				fmt.Printf("ERROR: File %s not found\n", item.ImageURL())
+				fmt.Printf("ERROR: File %s not found\n", item.ImageURL("jpg"))
 			}
 		}
 	})

templates/book.html

@@ -24,7 +24,7 @@
         <div id="covers">
             {{ range .Items }}
             <div class="cover-item">
-                <a target="_blank" href="https://www.buchhandel.de/buch/{{ .ISBN }}"><img src="/covers/{{ .ISBN }}.jpg" alt="{{ .Author | html }} - {{ .Title | html }}" title="zu buchhandel.de" /></a>
+                <a target="_blank" href="https://www.buchhandel.de/buch/{{ .ISBN }}"><img src="/covers/{{ .ISBN }}.{{ .FileExtension }}" alt="{{ .Author | html }} - {{ .Title | html }}" title="zu buchhandel.de" /></a>
             </div>
             {{ end }}
         </div>

templates/book.xml

@@ -18,7 +18,7 @@
     <summary>{{ .Author | html }} - "{{ .Title | html }}</summary>
     <content type="xhtml">
       <div xmlns="http://www.w3.org/1999/xhtml">
-        <img src="https://buchdesmonats.okoyono.de/covers/{{ .ISBN }}.jpg"/>
+        <img src="https://buchdesmonats.okoyono.de/covers/{{ .ISBN }}.{{ .FileExtension }}"/>
       </div>
     </content>
   </entry>

templates/comic.html

@@ -19,7 +19,7 @@
     <div id="covers">
       {{ range .Items }}
       <div class="cover-item">
-        <a target="_blank" href="https://www.buchhandel.de/buch/{{ .ISBN }}"><img src="/covers/{{ .ISBN }}.jpg" alt="{{ .Author | html }} - {{ .Title | html }}" title="zu buchhandel.de" /></a>
+        <a target="_blank" href="https://www.buchhandel.de/buch/{{ .ISBN }}"><img src="/covers/{{ .ISBN }}.{{ .FileExtension }}" alt="{{ .Author | html }} - {{ .Title | html }}" title="zu buchhandel.de" /></a>
       </div>
       {{ end }}
     </div>

templates/comic.xml

@@ -18,7 +18,7 @@
     <summary>{{ .Author | html }} - "{{ .Title | html }}"</summary>
     <content type="xhtml">
       <div xmlns="http://www.w3.org/1999/xhtml">
-        <img src="https://comicdesmonats.okoyono.de/covers/{{ .ISBN }}.jpg"/>
+        <img src="https://comicdesmonats.okoyono.de/covers/{{ .ISBN }}.{{ .FileExtension }}"/>
       </div>
     </content>
   </entry>